In this paper, we propose an evacuation support system for a large-scale disaster. In general, those conventional systems, such as an emergency earthquake reporting system, were designed to display objective information only by text. In these systems, we assumed that the recipients can select the optimal action to save themselves only if they have the necessary correct and immediate information. However, in reality, it is difficult to select the correct action because humans are influenced by the surrounding crowd. In psychology, this mechanism is called conformity. We focus on the conformity mechanism of human, and we control the emotional level of the escaping people by controlling the emotional behaviour of robots and avatars among the escaping people. We employ a broadcast controller, and conduct a simulation to confirm the effectiveness of the proposed system. Key words : broadcast control; conformity; normalcy bias